427521269 has 4 divisors (see below), whose sum is σ = 488595744. Its totient is φ = 366446796.

The previous prime is 427521247. The next prime is 427521293. The reversal of 427521269 is 962125724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 427521269 - 2⁸ = 427521013 is a prime.

It is a super-2 number, since 2×427521269² = 365548870894740722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427521209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30537227 + ... + 30537240.

It is an arithmetic number, because the mean of its divisors is an integer number (122148936).

Almost surely, 2^427521269 is an apocalyptic number.

It is an amenable number.

427521269 is a deficient number, since it is larger than the sum of its proper divisors (61074475).

427521269 is an equidigital number, since it uses as much as digits as its factorization.

427521269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61074474.

The product of its digits is 60480, while the sum is 38.

The square root of 427521269 is about 20676.5874602169. The cubic root of 427521269 is about 753.3311201325.

The spelling of 427521269 in words is "four hundred twenty-seven million, five hundred twenty-one thousand, two hundred sixty-nine".